Does the BMS control board CAN bus ±2kV pulse group test show signal distortion?

In burst testing, rapid transient pulses of ±2kV can easily cause CAN bus signal distortion. This is usually due to insufficient port protection and poor common-mode immunity. Solutions include adding TVS diode arrays to ground on the CAN_H and CAN_L lines for transient suppression; connecting a common-mode choke in series at the bus entry point to improve common-mode immunity; and ensuring proper matching of the 120Ω terminating resistor. Furthermore, using an isolated CAN transceiver can break ground loops and effectively prevent common-mode interference from entering the system side. Employing a multi-layer board design and providing a complete reference ground plane are also crucial. These measures significantly enhance the CAN bus's ability to withstand burst interference, ensuring communication reliability.